diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt
index 0e3898f2c..5f6d96d57 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt
@@ -165,8 +165,8 @@ fun getNowSeconds() = System.currentTimeMillis() / 1000L
 
 fun isWeekend(i: Int, isSundayFirst: Boolean): Boolean {
     return if (isSundayFirst) {
-        i == 0 || i == 6
+        i == 0 || i == 6 || i == 7 || i == 13
     } else {
-        i == 5 || i == 6
+        i == 5 || i == 6 || i == 12 || i == 13
     }
 }